Screen-use options: These files are created for viewing on your monitor

ABOUT THIS IMAGE:

These are images of three of the most distant supernovae known, discovered
using the Hubble Space Telescope as a supernova search engine. The stars
exploded back when the universe was approximately half its current age.
The light is just arriving at Earth now. Supernovae are so bright they
can be seen far away and far back in time. This allows astronomers to
trace the expansion rate of the universe, and to determine how it is
affected by the repulsive push of dark energy, an unknown form of energy
that pervaded space.